Around 3.26 billion years ago — long before the dinosaurs — a massive asteroid measuring nearly 36 miles (58 km) across smashed into the Earth. Geologists have now reconstructed this cataclysmic event, and it was far, far bigger than we thought. Here's how things went down on that fateful day. »4/10/14 5:19pm 4/10/14 5:19pm

You can call them "near Earth objects" if you want to. I'll stick with "asteroids hellbent on obliterating our planet and all we hold dear." Here's the lineup of the space rocks closest to killing us, and where they are. »10/22/10 4:00pm 10/22/10 4:00pm